(Los Angeles Times) Try: "filetype:xls site:za confidential"
The National Security Agency just declassified a hefty 643-page research manual called Untangling the Web: A Guide to Internet Research (PDF) that, at least at first, doesn't appear all that interesting. That is, except for one section on page 73: "Google Hacking."
"Say you're a cyberspy for the NSA and you want sensitive inside information on companies in South Africa," explains Kim Zetter at Wired. "What do you do?"
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Well, you could type the following advanced search into Google — "filetype:xls site:za confidential" — to uncover a trove of seemingly private spreadsheets. How about an Excel file containing Russian passwords? Try: "filetype:xls site:ru login."
These are just two examples of the numerous private files that are inadvertently uploaded to the Internet, and can be accessed if you know the right Google search terms.